Container and paperboard blanks for forming same

ABSTRACT

A container and paperboard blanks for forming the container have a wall member having cuts formed therethrough with portions of the container adjacent the cuts extending upwardly to form ledges on an inner surface of the wall member. A bottom closure member is positioned in contact with the ledges and there maintained for closing one end of the container.

Unlted States Patent 1191 1111 3,923,233 Smith 1 1 Dec. 2 1975 [54]CONTAINER AND PAPERBOARD BLANKS 1,147,551 7/1915 Rose 229/23 A FORFORMING SAME 1,430,455 9/1922 Lowey. 229/23 A 1,665,359 4/1928 Haas229/23 A 1 1 Inventor: Ernest Smith, Kansas City, 1,911,073 5/1933Dyment 1 1 229 41 c 2,047,790 7/1936 Mascarenh'as 229/93 [731 Absgnee'.Petmlwm Company 2,726,803 12/1955 Ketler 1 229 5.5 Bartlesvlle Okla-2,733,852 2/1956 Williamson. 229/41 22 Filed; 4 1973 2,884,175 4/1959Wilson 1 229/5.5 3,451,610 6/1969 Beichler et a1 229/23 [21] Appl. No.:421,507

R l d Application Data Primary Examiner-George E. Lowrance [63]Continuation of Ser. No. 261,370, June 9, 1972. Assls'am Be'mStemabandoned.

C [57] ABSTRACT 52 U.S. 1. 229 5.5; 229 4.5; 229 21; l 1 l 229/2/3 A Acontamer and paperboard blanks for formmg the [51] Int B65D 3/14container have a wall member having cuts formed [58] Field of 23 A 21therethrough with portions of the container adjacent 5 the cutsextending upwardly to form ledges on an i inner surface of the wallmember. A bottom closure {56] References Cited member is positioned incontact with the ledges and UNITED STATES PATENTS there maintained forclosing one end of the container.

969,367 9/1910 Hamilton 1. 229 93 17 Claims, 5 Drawing Figures US. atentDec. 2, 1975 Sheet 1 of 2 3,923,233

fiuzmmIoxx CONTAINER AND PAPERBOARD BLANKS FOR FORMING SAME This is acontinuation of application Serial No. 261,370, filed June 9, 1972, andnow abandoned.

It is desirable to provide paperboard blanks and a container formedtherefrom which is of high quality yet utilizes a low amount ofmaterial, labor, and equipment for the formation of said container.

This invention therefore resides in a container and paperboard blanksfor forming said container which has a wall member having cuts formedtherethrough with portions of the container adjacent the cuts extendinginwardly to form ledges on an annular surface of the wall member. A wallclosure member is positioned in contact with the ledges and theremaintained for closing one end of the container.

Other aspects, objects, and advantages of the present invention willbecome apparent from a study of the disclosure, the appended claims, andthe drawings.

The drawings are diagrammatic views of the paperboard blanks andcontainer formed therefrom.

FIG. 1 shows a wall member, I

FIG. 2 shows a bottom closure member,

FIG. 3 is a longitudinal sectional view of the container,

FIG. 4 is a partial sectional view of the container as viewed from thefirst or bottom end, and

FIG. 5 is a partial sectional view of the container as viewed from thesecond or upper end.

Referring to FIG. 1, a generally rectangular wall member 2 has first andsecond overlap end portions 4, 6, first and second edge portions 8, andfirst and second edges 12, 14. The first edge portion 8 has a fold line16 extending across the wall member 2 substantially parallel to thefirst edge 12 and is spaced a distance (d) therefrom. A plurality ofspaced-apart notches, preferably first and second type notches 18, 20each having a different configuration, extend from the first edge 12 tosaid fold line 16 thereby forming tabs 22 between said notches 18, 20.Each first type notch 18 is preferably separated from an adjacent firsttype notch 18 by an intervening second type notch 20. A plurality ofspaced-apart cuts 24, preferably of arcuate configuration are formed onthe first edge portion 8 spaced from the fold 16 a distance (d') towardthe second edge 14 of the wall member 2. Where arcuate cuts 24 areutilized, it is preferred that a middle portion 26 of each cut be closerto the fold line 16 than the ends 28, 30 of the cut 24. Further, it ispreferred that the ends 28, 30 be spaced :1 common distance from thefold line 16. It is also preferred that the distance (d) from fold line16 to the first edge 12 of the wall member 2 is substantially equal tothe difference between the distance (d) from the fold line 16 to thecuts 24 less the thickness (t) of the bottom closure member 32 as shownin FIGS. 2 and 3.

The bottom closure member 32 has a peripheral length substantially equalto the length of the first edge 12 of the wall member between saidoverlap end portions 4, 6.

In the formed condition of the container, as shown in FIG. 3, theoverlap end portions 4, 6 are secured one to the other forming containerwalls 34 having an axis. The curvature of the wall member 2 causesportions 36 of the container walls 34 from the cuts 24 toward the secondedge 14 to extend inwardly to a location spaced a distance from the axisless than the distance from the axis to the first edge 12 of saidcontainer walls 34, thereby forming a plurality of ledges 38 along aninner surface 40 of the container walls 34.

The bottom closure member 32 is then positioned within the containerwalls adjacent the first edge portion 8 and in contact with the ledges38.

The tabs 22 are thereafter infolded into contact with the bottom closuremember 32 for maintaining said bottom closure member 32 in contact withsaid ledges 38.

An adhesive material, such as a wax base hot melt adhesive, a latex typeadhesive, contact cement, for example, is preferably located on only aportion of each tab 22, preferably a middle portion 42 of the tab 22,for maintaining each tab portion 42 in contact with associated edgeportions of the container walls 34 for maintaining the tabs 22 incontact with the bottom closure member 32. If the paperboard for wallmember 2 were polyethylene coated, middle portion 42 of the tab 22 couldbe maintained in contact with the associated edge portion of containerwall 34 by heat sealing. Cuts 52 along score line 16 permit middleportion 42 to be folded closely against container wall 34 for maximumcontact of the adhesive. Score lines 54 and 56 cause the container toassume a round configuration along the bottom portion of sidewall 34. Itis further preferred that the other tab portions 44, 46 each be foldedinwardly towards the axis for providing a plurality of tab ledges 48 forcontacting and maintaining the bottom closure member relative to theclosure walls 34.

FIG. 5 shows a ledge 38 as viewed from the upper or second edge portion10 of the container and FIG. 4 shows a tab ledge 48 as viewed from thebottom or first edge portion 8 of the container.

FIG. 1 shows a particularly useful container blank wherein there areeight tabs 22 and a score line 50 extends across the width of the blankfrom each second type notch 20. These score lines 50 cause the containerto be other than cylindrical whereby the bottom closure member 32contacts the ledges 38 more easily owing to the fact that the scorelines 50 urge the walls to lead across the bottom closure member at thecuts 24.

Other modifications and alterations of this invention will becomeapparent to those skilled in the art from the foregoing discussion andaccompanying drawings, and it should be understood that this inventionis not to be unduly limited thereto.

I claim:

1. A packaging container comprising:

a wall member having first and second overlapping end portions securedone to the other for forming a continuously curved container wall havinga central axis, first and second edges, and first and second edgeportions, said container wall having a plurality of spaced-apart cutsformed in said first edge portion of said container wall with a middleportion of each said out being spaced a uniform distance from said firstedge of said container wall, each said out being of arcuateconfiguration with the ends of each said out being located closer tosaid second edge of said container wall than said middle portion of eachsaid cut, portions of the container wall adjacent said cuts toward saidsecond edge of said container extending inwardly to a location spacedfrom said axis a distance less than the distance from said axis to theremainder of said container wall,

said portions thereby forming a plurality of ledges along an innersurface of said container wall;

a bottom closure member having a continuously curved perimeter and beingpositioned at said first edge portion of said container wall in contactwith said ledges for closing one end of said container, said perimeterof said bottom closure member being of substantially. the same length assaid first edge of said container wall; and

means for maintaining said bottom closure member in contact with saidledges.

2. A container, as set forth in claim 1, wherein said cuts are of anarcuate configuration with the ends of each out being located nearerthan the middle portion of each cut to the second edge of the container.

3. A container, as set forth in claim 1, wherein said means comprises atleast a portion of the first edge portion of the wall member beingfolded into contact with the bottom closure member.

4. A container, as set forth in claim 1, wherein a plurality of notchesare formed at spaced-apart locations along the first edge portion of thewall member thereby forming a plurality of tabs, said tabs beinginfolded toward and into contact with the bottom closure memher.

5. A container, as set forth in claim 4, wherein said notches comprisefirst notches and second notches of different configuration, adjacentfirst notches being separated by intervening second notches.

6. A container, as set forth in claim 4, including an adhesive locatedon only a portion of each said tab thereby maintaining said tab portionin contact with associated edge portions of the container walls formaintaining the tabs in contact with the bottom closure member.

7. A container, as set forth in claim 6, wherein the other portions ofthe tab are folded inwardly toward the axis for providing a plurality oftab ledges for contacting and maintaining the bottom closure memberrelative to the closure walls.

8. A container, as set forth in claim 6, wherein the portion of the tabshaving the adhesive thereon is the middle portion of the tabs asmeasured around the first edge of the container walls.

9. A paperboard blank for forming a continuously curved sidewall of acontainer, said blank comprising a generally rectangular wall memberhaving first and second overlap end portions, first and second edgeportions, and first and second edges, the length of said first edgebetween said overlap end portions being substantially equal to theperipheral length of a bottom closure member which is to be employed toform the bottom of said container, said first edge portion having a foldline extending across said wall member substantially parallel to saidfirst edge and spaced a first distance therefrom, a plurality ofspaced-apart notches extending from said first edge to said fold linethereby forming tabs between said notches, and a plurality ofspacedapart cuts formed on said first edge portion with a middle portionof each said out being spaced from said fold line a second distancetoward said second edge of said wall member, said spaced-apart cuts eachbeing of arcuate configuration with said middle portion of each cutbeing closer to said fold line than the ends of the respective cut, eachsaid tab being provided with means for sealing a middle portion thereofto another surface of said wall member, said first distance being atleast substantially equal to the difference between said second distanceand the thickness of said bottom closure member which is to be employedto form the bottom of said container.

10. A paperboard blank, as set forth in claim 9, wherein said notchescomprise first notches and second notches of different configurationwith adjacent first notches being separated by intervening secondnotches.

11. A paperboard blank, as set forth in claim 9, wherein the distancefrom the fold line to the first edge of the wall member is substantiallyequal to the difference between the distance from the fold line to theportions of the cuts nearest said fold line less the thickness of thebottom closure member to be used in conjunction with said blank to forma container.

12. A paperboard blank, as set forth in claim 9, wherein said means forsealing comprises an adhesive coating on said middle portion of eachsaid tab.

13. A paperboard blank, as set forth in claim 9, wherein said means forsealing comprises a heat sealable thermoplastic resin coating on saidmiddle portion of each said tab.

14. A paperboard blank, as set forth in claim 9, wherein each end ofeach said cut is spaced a common distance from said fold line.

15. A paperboard blank, as set forth in claim 14, wherein said cuts areof arcuate configuration with the middle portion of each out beingcloser than the ends of said out to said fold line.

16. Paperboard blanks for forming a continuously curved sidewall of acontainer, comprising:

a generally rectangular wall member having first and second overlap endportions, first and second edge portions, and first and second edges,said first edge portion having a fold line extending across said wallmember substantially parallel to said first edge and spaced a firstdistance therefrom, a plurality of spaced-apart notches extending fromsaid first edge to said fold line thereby forming tabs between saidnotches, and a plurality of spaced-apart cuts formed on said first edgeportion with a middle portion of each said cut being spaced from saidfold line a second distance toward said second edge of said wall member,said spaced-apart cuts each being of arcuate configuration with saidmiddle portion of each cut being closer to said fold line than the endsof the respective cut, said first distance being at least substantiallyequal to the difference between said second distance and the thicknessof a bottom closure member which is to be employed to form the bottom ofsaid container; and

a bottom closure member having a peripheral length substantially equalto the length of said first edge of said wall member between saidoverlap end portions.

17. Paperboard blanks in accordance with claim 16 wherein said bottomclosure member is circular with said peripheral length forming acircumference of the circular closure member.

1. A packaging container comprising: a wall member having first andsecond overlapping end portions secured one to the other for forming acontinuously curved container wall having a central axis, first andsecond edges, and first and second edge portions, said container wallhaving a plurality of spaced-apart cuts formed in said first edgeportion of said container wall with a middle portion of each said cutbeing spaced a uniform distance from said first edge of said containerwall, each said cut being of arcuate configuration with the ends of eachsaid cut being located closer to said second edge of said container wallthan said middle portion of each said cut, portions of the containerwall adjacent said cuts toward said second edge of said containerextending inwardly to a location spaced from said axis a distance lessthan the distance from said axis to the remainder of said containerwall, said portions thereby forming a plurality of ledges along an innersurface of said container wall; a bottom closure member having acontinuously curved perimetEr and being positioned at said first edgeportion of said container wall in contact with said ledges for closingone end of said container, said perimeter of said bottom closure memberbeing of substantially the same length as said first edge of saidcontainer wall; and means for maintaining said bottom closure member incontact with said ledges.
 2. A container, as set forth in claim 1,wherein said cuts are of an arcuate configuration with the ends of eachcut being located nearer than the middle portion of each cut to thesecond edge of the container.
 3. A container, as set forth in claim 1,wherein said means comprises at least a portion of the first edgeportion of the wall member being folded into contact with the bottomclosure member.
 4. A container, as set forth in claim 1, wherein aplurality of notches are formed at spaced-apart locations along thefirst edge portion of the wall member thereby forming a plurality oftabs, said tabs being infolded toward and into contact with the bottomclosure member.
 5. A container, as set forth in claim 4, wherein saidnotches comprise first notches and second notches of differentconfiguration, adjacent first notches being separated by interveningsecond notches.
 6. A container, as set forth in claim 4, including anadhesive located on only a portion of each said tab thereby maintainingsaid tab portion in contact with associated edge portions of thecontainer walls for maintaining the tabs in contact with the bottomclosure member.
 7. A container, as set forth in claim 6, wherein theother portions of the tab are folded inwardly toward the axis forproviding a plurality of tab ledges for contacting and maintaining thebottom closure member relative to the closure walls.
 8. A container, asset forth in claim 6, wherein the portion of the tabs having theadhesive thereon is the middle portion of the tabs as measured aroundthe first edge of the container walls.
 9. A paperboard blank for forminga continuously curved sidewall of a container, said blank comprising agenerally rectangular wall member having first and second overlap endportions, first and second edge portions, and first and second edges,the length of said first edge between said overlap end portions beingsubstantially equal to the peripheral length of a bottom closure memberwhich is to be employed to form the bottom of said container, said firstedge portion having a fold line extending across said wall membersubstantially parallel to said first edge and spaced a first distancetherefrom, a plurality of spaced-apart notches extending from said firstedge to said fold line thereby forming tabs between said notches, and aplurality of spaced-apart cuts formed on said first edge portion with amiddle portion of each said cut being spaced from said fold line asecond distance toward said second edge of said wall member, saidspaced-apart cuts each being of arcuate configuration with said middleportion of each cut being closer to said fold line than the ends of therespective cut, each said tab being provided with means for sealing amiddle portion thereof to another surface of said wall member, saidfirst distance being at least substantially equal to the differencebetween said second distance and the thickness of said bottom closuremember which is to be employed to form the bottom of said container. 10.A paperboard blank, as set forth in claim 9, wherein said notchescomprise first notches and second notches of different configurationwith adjacent first notches being separated by intervening secondnotches.
 11. A paperboard blank, as set forth in claim 9, wherein thedistance from the fold line to the first edge of the wall member issubstantially equal to the difference between the distance from the foldline to the portions of the cuts nearest said fold line less thethickness of the bottom closure member to be used in conjunction withsaid blank to form a container.
 12. A paperboard blank, as set forth inclaim 9, wHerein said means for sealing comprises an adhesive coating onsaid middle portion of each said tab.
 13. A paperboard blank, as setforth in claim 9, wherein said means for sealing comprises a heatsealable thermoplastic resin coating on said middle portion of each saidtab.
 14. A paperboard blank, as set forth in claim 9, wherein each endof each said cut is spaced a common distance from said fold line.
 15. Apaperboard blank, as set forth in claim 14, wherein said cuts are ofarcuate configuration with the middle portion of each cut being closerthan the ends of said cut to said fold line.
 16. Paperboard blanks forforming a continuously curved sidewall of a container, comprising: agenerally rectangular wall member having first and second overlap endportions, first and second edge portions, and first and second edges,said first edge portion having a fold line extending across said wallmember substantially parallel to said first edge and spaced a firstdistance therefrom, a plurality of spaced-apart notches extending fromsaid first edge to said fold line thereby forming tabs between saidnotches, and a plurality of spaced-apart cuts formed on said first edgeportion with a middle portion of each said cut being spaced from saidfold line a second distance toward said second edge of said wall member,said spaced-apart cuts each being of arcuate configuration with saidmiddle portion of each cut being closer to said fold line than the endsof the respective cut, said first distance being at least substantiallyequal to the difference between said second distance and the thicknessof a bottom closure member which is to be employed to form the bottom ofsaid container; and a bottom closure member having a peripheral lengthsubstantially equal to the length of said first edge of said wall memberbetween said overlap end portions.
 17. Paperboard blanks in accordancewith claim 16 wherein said bottom closure member is circular with saidperipheral length forming a circumference of the circular closuremember.